Robert Irwin Calls Sister Bindi An ‘Amazing’ Mom In Heartwarming National Siblings Day Message

Robert Irwin never fails to show Bindi how much he loves her! The proud brother shared a heartwarming Instagram tribute to his older sister in honor of National Siblings Day – a holiday that came two weeks after Bindi gave birth to her first child, Grace Warrior Irwin Powell. He shared a photo of himself posing with Bindi and little Grace and wrote, “Happy #NationalSiblingsDay! I’ve got the absolute best sister – Grace definitely has an amazing mum.”